functions/strings.php

   1 <?php
   2
   3    $strings_php = true;
   4
   5    //*************************************************************************
   6    // Count the number of occurances of $needle are in $haystack.
   7    //*************************************************************************
   8    function countCharInString($haystack, $needle) {
   9       $len = strlen($haystack);
  10       for ($i = 0; $i < $len; $i++) {
  11          if ($haystack[$i] == $needle)
  12             $count++;
  13       }
  14       return $count;
  15    }
  16
  17    //*************************************************************************
  18    // Read from the back of $haystack until $needle is found, or the begining
  19    //    of the $haystack is reached.
  20    //*************************************************************************
  21    function readShortMailboxName($haystack, $needle) {
  22       if (substr($haystack, -1) == $needle)
  23          $haystack = substr($haystack, 0, strlen($haystack) - 1);
  24
  25       if (strrpos($haystack, $needle)) {
  26          $pos = strrpos($haystack, $needle) + 1;
  27          $data = substr($haystack, $pos, strlen($haystack));
  28       } else {
  29          $data = $haystack;
  30       }
  31       return $data;
  32    }
  33
  34    // Searches for the next position in a string minus white space
  35    function next_pos_minus_white ($haystack, $pos) {
  36       while (substr($haystack, $pos, 1) == " " ||
  37              substr($haystack, $pos, 1) == "\t" ||
  38              substr($haystack, $pos, 1) == "\n" ||
  39              substr($haystack, $pos, 1) == "\r") {
  40          if ($pos >= strlen($haystack))
  41             return -1;
  42          $pos++;
  43       }
  44       return $pos;
  45    }
  46
  47    // Wraps text at $wrap characters
  48    // Has a problem with special HTML characters, so call this before
  49    // you do character translation.
  50    // Specifically, &#039 comes up as 5 characters instead of 1.
  51    // This should not add newlines to the end of lines.
  52    function sqWordWrap(&$line, $wrap) {
  53       preg_match("/^([\s>]*)([^\s>].*)?$/", $line, $regs);
  54       $beginning_spaces = $regs[1];
  55       $words = explode(" ", $regs[2]);
  56
  57       $i = 0;
  58       $line = $beginning_spaces;
  59
  60       while ($i < count($words)) {
  61          // Force one word to be on a line (minimum)
  62          $line .= $words[$i];
  63          $line_len = strlen($beginning_spaces) + strlen($words[$i]) +
  64              strlen($words[$i + 1]) + 2;
  65          $i ++;
  66
  67          // Add more words (as long as they fit)
  68          while ($line_len < $wrap && $i < count($words)) {
  69             $line .= ' ' . $words[$i];
  70             $i++;
  71             $line_len += strlen($words[$i]) + 1;
  72          }
  73
  74          // Skip spaces if they are the first thing on a continued line
  75          while (!$words[$i] && $i < count($words)) {
  76             $i ++;
  77          }
  78
  79          if ($i < count($words)) {
  80             $line .= "\n$beginning_spaces";
  81          }
  82       }
  83    }
  84
  85
  86    // Does the opposite of sqWordWrap()
  87    function sqUnWordWrap(&$body)
  88    {
  89        $lines = explode("\n", $body);
  90        $body = "";
  91        $PreviousSpaces = "";
  92        for ($i = 0; $i < count($lines); $i ++)
  93        {
  94            preg_match("/^([\s>]*)([^\s>].*)?$/", $lines[$i], $regs);
  95            $CurrentSpaces = $regs[1];
  96            $CurrentRest = $regs[2];
  97            if ($i == 0)
  98            {
  99                $PreviousSpaces = $CurrentSpaces;
 100                $body = $lines[$i];
 101            }
 102            else if ($PreviousSpaces == $CurrentSpaces &&  // Do the beginnings match
 103                strlen($lines[$i - 1]) > 65 &&             // Over 65 characters long
 104                strlen($CurrentRest))                      // and there's a line to continue with
 105            {
 106                $body .= ' ' . $CurrentRest;
 107            }
 108            else
 109            {
 110                $body .= "\n" . $lines[$i];
 111                $PreviousSpaces = $CurrentSpaces;
 112            }
 113        }
 114        $body .= "\n";
 115    }
 116
 117
 118    /** Returns an array of email addresses **/
 119    function parseAddrs($text) {
 120       if (trim($text) == "") {
 121          return;
 122       }
 123       $text = str_replace(" ", "", $text);
 124       $text = ereg_replace( '"[^"]*"', "", $text);
 125       $text = str_replace(",", ";", $text);
 126       $array = explode(";", $text);
 127       for ($i = 0; $i < count ($array); $i++) {
 128                             $array[$i] = eregi_replace ("^.*[<]", "", $array[$i]);
 129                             $array[$i] = eregi_replace ("[>].*$", "", $array[$i]);
 130                   }
 131       return $array;
 132    }
 133
 134    /** Returns a line of comma separated email addresses from an array **/
 135    function getLineOfAddrs($array) {
 136       if (is_array($array)) {
 137         $to_line = implode(", ", $array);
 138         $to_line = trim(ereg_replace(",,+", ",", $to_line));
 139       } else {
 140         $to_line = "";
 141       }
 142       return $to_line;
 143    }
 144
 145    function translateText(&$body, $wrap_at, $charset) {
 146       global $where, $what; // from searching
 147
 148       if (!isset($url_parser_php)) {
 149          include "../functions/url_parser.php";
 150       }
 151
 152       $body_ary = explode("\n", $body);
 153       for ($i=0; $i < count($body_ary); $i++) {
 154          $line = $body_ary[$i];
 155          if (strlen($line) - 2 >= $wrap_at) {
 156             sqWordWrap($line, $wrap_at);
 157          }
 158          $line = charset_decode($charset, $line);
 159          $line = str_replace("\t", '        ', $line);
 160
 161          // We need to do it twice to catch times where there
 162          // are an odd number of spaces
 163          if (ereg("^ (.*)$", $line, $regs))
 164              $line = "&nbsp;" . $regs[1];
 165          $line = str_replace('  ', '&nbsp; ', $line);
 166          $line = str_replace('  ', '&nbsp; ', $line);
 167          $line = nl2br($line);
 168
 169          parseUrl ($line);
 170
 171          $Quotes = 0;
 172          $pos = 0;
 173          while (1)
 174          {
 175              if (strpos($line, '&nbsp;', $pos) === $pos)
 176              {
 177                 $pos += 6;
 178              }
 179              else if (strpos($line, '&gt;', $pos) === $pos)
 180              {
 181                 $pos += 4;
 182                 $Quotes ++;
 183              }
 184              else
 185              {
 186                  break;
 187              }
 188          }
 189
 190          if ($Quotes > 1) {
 191             $line = "<FONT COLOR=FF0000>$line</FONT>\n";
 192          } else if ($Quotes) {
 193             $line = "<FONT COLOR=800000>$line</FONT>\n";
 194          }
 195
 196          if ($line)
 197          {
 198              $line = '<tt>' . $line . '</tt>';
 199          }
 200
 201          $body_ary[$i] = $line . '<br>';
 202       }
 203       $body = implode("\n", $body_ary);
 204    }
 205
 206    /* SquirrelMail version number -- DO NOT CHANGE */
 207    $version = "0.6pre1 (cvs)";
 208
 209
 210    function find_mailbox_name ($mailbox) {
 211       $mailbox = trim($mailbox);
 212       if (substr($mailbox, strlen($mailbox)-1, strlen($mailbox)) == "\"") {
 213          $mailbox = substr($mailbox, 0, strlen($mailbox) - 1);
 214          $pos = strrpos ($mailbox, "\"")+1;
 215          $box = substr($mailbox, $pos);
 216       } else {
 217          $box = substr($mailbox, strrpos($mailbox, " ")+1, strlen($mailbox));
 218       }
 219       return $box;
 220    }
 221
 222    function replace_spaces ($string) {
 223       return str_replace(" ", "&nbsp;", $string);
 224    }
 225
 226    function replace_escaped_spaces ($string) {
 227       return str_replace("&nbsp;", " ", $string);
 228    }
 229
 230    function get_location () {
 231       # This determines the location to forward to relative
 232       # to your server.  If this doesnt work correctly for
 233       # you (although it should), you can remove all this
 234       # code except the last two lines, and change the header()
 235       # function to look something like this, customized to
 236       # the location of SquirrelMail on your server:
 237       #
 238       #   http://www.myhost.com/squirrelmail/src/login.php
 239
 240       global $PHP_SELF, $SERVER_NAME, $HTTPS, $HTTP_HOST, $SERVER_PORT;
 241
 242       // Get the path
 243       $path = substr($PHP_SELF, 0, strrpos($PHP_SELF, '/'));
 244
 245       // Check if this is a HTTPS or regular HTTP request
 246       $proto = "http://";
 247       if(isset($HTTPS) && $HTTPS == 'on' ) {
 248         $proto = "https://";
 249       }
 250
 251       // Get the hostname from the Host header or server config.
 252       $host = "";
 253       if (isset($HTTP_HOST) && !empty($HTTP_HOST))
 254       {
 255           $host = $HTTP_HOST;
 256       }
 257       else if (isset($SERVER_NAME) && !empty($SERVER_NAME))
 258       {
 259           $host = $SERVER_NAME;
 260       }
 261
 262       $port = '';
 263       if (! strstr($host, ':'))
 264       {
 265           if (isset($SERVER_PORT)) {
 266               if ($SERVER_PORT != 80) {
 267                   $port = sprintf(':%d', $SERVER_PORT);
 268               }
 269           }
 270       }
 271
 272       if ($host)
 273           return $proto . $host . $port . $path;
 274
 275       // Fallback is to omit the server name and use a relative URI,
 276       // although this is not RFC 2616 compliant.
 277       return $path;
 278    }
 279
 280    function sqStripSlashes($string) {
 281       if (get_magic_quotes_gpc()) {
 282          $string = stripslashes($string);
 283       }
 284       return $string;
 285    }
 286
 287
 288    // These functions are used to encrypt the passowrd before it is
 289    // stored in a cookie.
 290    function OneTimePadEncrypt ($string, $pad) {
 291       for ($i = 0; $i < strlen ($string); $i++) {
 292          $encrypted .= chr (ord($string[$i]) ^ ord($pad[$i]));
 293       }
 294
 295       return base64_encode($encrypted);
 296    }
 297
 298    function OneTimePadDecrypt ($string, $pad) {
 299       $encrypted = base64_decode ($string);
 300
 301       for ($i = 0; $i < strlen ($encrypted); $i++) {
 302          $decrypted .= chr (ord($encrypted[$i]) ^ ord($pad[$i]));
 303       }
 304
 305       return $decrypted;
 306    }
 307
 308
 309    // Randomize the mt_rand() function.  Toss this in strings or
 310    // integers and it will seed the generator appropriately.
 311    // With strings, it is better to get them long. Use md5() to
 312    // lengthen smaller strings.
 313    function sq_mt_seed($Val)
 314    {
 315        // if mt_getrandmax() does not return a 2^n - 1 number,
 316        // this might not work well.  This uses $Max as a bitmask.
 317        $Max = mt_getrandmax();
 318
 319        if (! is_int($Val))
 320        {
 321            if (function_exists("crc32"))
 322            {
 323                $Val = crc32($Val);
 324            }
 325            else
 326            {
 327                $Str = $Val;
 328                $Pos = 0;
 329                $Val = 0;
 330                $Mask = $Max / 2;
 331                $HighBit = $Max ^ $Mask;
 332                while ($Pos < strlen($Str))
 333                {
 334                    if ($Val & $HighBit)
 335                    {
 336                        $Val = (($Val & $Mask) << 1) + 1;
 337                    }
 338                    else
 339                    {
 340                        $Val = ($Val & $Mask) << 1;
 341                    }
 342                    $Val ^= $Str[$Pos];
 343                    $Pos ++;
 344                }
 345            }
 346        }
 347
 348        if ($Val < 0)
 349          $Val *= -1;
 350        if ($Val = 0)
 351          return;
 352
 353        mt_srand(($Val ^ mt_rand(0, $Max)) & $Max);
 354    }
 355
 356
 357    // This function initializes the random number generator fairly well.
 358    // It also only initializes it once, so you don't accidentally get
 359    // the same 'random' numbers twice in one session.
 360    function sq_mt_randomize()
 361    {
 362       global $REMOTE_PORT, $REMOTE_ADDR, $UNIQUE_ID;
 363       static $randomized;
 364
 365       if ($randomized)
 366          return;
 367
 368       // Global
 369       sq_mt_seed((int)((double) microtime() * 1000000));
 370       sq_mt_seed(md5($REMOTE_PORT . $REMOTE_ADDR . getmypid()));
 371
 372       // getrusage
 373       if (function_exists("getrusage")) {
 374          $dat = getrusage();
 375          sq_mt_seed(md5($dat["ru_nswap"] . $dat["ru_majflt"] .
 376             $dat["ru_utime.tv_sec"] . $dat["ru_utime.tv_usec"]));
 377       }
 378
 379       // Apache-specific
 380       sq_mt_seed(md5($UNIQUE_ID));
 381
 382       $randomized = 1;
 383    }
 384
 385    function OneTimePadCreate ($length=100) {
 386       sq_mt_randomize();
 387
 388       for ($i = 0; $i < $length; $i++) {
 389          $pad .= chr(mt_rand(0,255));
 390       }
 391
 392       return $pad;
 393    }
 394
 395    // Check if we have a required PHP-version. Return TRUE if we do,
 396    // or FALSE if we don't.
 397    // To check for 4.0.1, use sqCheckPHPVersion(4,0,1)
 398    // To check for 4.0b3, use sqCheckPHPVersion(4,0,-3)
 399    // Does not handle betas like 4.0.1b1 or development versions
 400    function sqCheckPHPVersion($major, $minor, $release) {
 401
 402       $ver = phpversion();
 403       eregi("^([0-9]+)\.([0-9]+)(.*)", $ver, $regs);
 404
 405       // Parse the version string
 406       $vmajor  = strval($regs[1]);
 407       $vminor  = strval($regs[2]);
 408       $vrel    = $regs[3];
 409       if($vrel[0] == ".")
 410          $vrel = strval(substr($vrel, 1));
 411       if($vrel[0] == "b" || $vrel[0] == "B")
 412          $vrel = - strval(substr($vrel, 1));
 413       if($vrel[0] == "r" || $vrel[0] == "R")
 414          $vrel = - strval(substr($vrel, 2))/10;
 415
 416       // Compare major version
 417       if($vmajor < $major) return false;
 418       if($vmajor > $major) return true;
 419
 420       // Major is the same. Compare minor
 421       if($vminor < $minor) return false;
 422       if($vminor > $minor) return true;
 423
 424       // Major and minor is the same as the required one.
 425       // Compare release
 426       if($vrel >= 0 && $release >= 0) {       // Neither are beta
 427          if($vrel < $release) return false;
 428       } else if($vrel >= 0 && $release < 0){  // This is not beta, required is beta
 429          return true;
 430       } else if($vrel < 0 && $release >= 0){  // This is beta, require not beta
 431          return false;
 432       } else {                                // Both are beta
 433          if($vrel > $release) return false;
 434       }
 435
 436       return true;
 437    }
 438
 439    /* Returns a string showing the size of the message/attachment */
 440    function show_readable_size($bytes)
 441    {
 442        $bytes /= 1024;
 443        $type = 'k';
 444
 445        if ($bytes / 1024 > 1)
 446        {
 447            $bytes /= 1024;
 448            $type = 'm';
 449        }
 450
 451        if ($bytes < 10)
 452        {
 453            $bytes *= 10;
 454            settype($bytes, "integer");
 455            $bytes /= 10;
 456        }
 457        else
 458            settype($bytes, "integer");
 459
 460        return $bytes . '<small>&nbsp;' . $type . '</small>';
 461    }
 462
 463    /* Generates a random string from the caracter set you pass in
 464     *
 465     * Flags:
 466     *   1 = add lowercase a-z to $chars
 467     *   2 = add uppercase A-Z to $chars
 468     *   4 = add numbers 0-9 to $chars
 469     */
 470
 471    function GenerateRandomString($size, $chars, $flags = 0)
 472    {
 473       if ($flags & 0x1)
 474           $chars .= 'abcdefghijklmnopqrstuvwxyz';
 475       if ($flags & 0x2)
 476           $chars .= 'ABCDEFGHIJKLMNOPQRSTUVWXYZ';
 477       if ($flags & 0x4)
 478           $chars .= '0123456789';
 479
 480       if ($size < 1 || strlen($chars) < 1)
 481           return "";
 482
 483       sq_mt_randomize(); // Initialize the random number generator
 484
 485       while (strlen($String) < $size) {
 486          $String .= $chars[mt_rand(0, strlen($chars))];
 487       }
 488
 489       return $String;
 490    }
 491
 492 ?>